Operation, Applications, Spline Joinery

OPERATION

WARNING:

Do not allow familiarity with tools to make you careless. Remember that a careless fraction of a second is suf- ficient to inflict serious injury.

WARNING:

Always wear safety goggles or safety glasses with side shields when operating power tools. Failure to do so could result in objects being thrown into your eyes re- sulting in possible serious injury.

APPLICATIONS

You may use this tool for the purposes listed below:

nCutting precise mating oval slots in hard wood, soft wood, plywood and particle board

SPLINE JOINERY

Spline joinery is one of the strongest methods of joinery used in woodworking. When glue is properly applied to a spline and to the joint area of the wood pieces being connected, a large surface area receives the adhesion properties of the glue. This forms a strong joint.

Traditional spline joinery requires cutting slots with a router or table saw. Small, thin strips of wood must then be cut to fit inside the slots and act as splines.

Newer methods of spline joinery use a plate or biscuit joiner to cut precise mating oval slots in adjoining boards. This biscuit joiner is a fast, simple, and accurate plunge-cutting tool that can be used to cut slots in hardwood, softwood, plywood, particle board, and other pressed woods.

Football shaped wafers, called biscuits, are then placed inside the slots with glue and used to help line up adjoining surfaces. When a water based glue is used, the biscuits swell in the joint, making an extremely strong and firm bond. White glue, yellow glue, carpenters glue, hide glue and aliphatic resin glue are examples of water-based glues.This bonding technique has traditionally been limited to making edge-to- edge joints. However, with the use of your new biscuit joiner, biscuits can now be easily used to connect butt, miter, and T-joints. Biscuit joining can be as strong as mortise and tenon, tongue and groove, standard spline, and doweled joints. In most cases the material around the biscuit will break before the biscuit itself will break. A greater surface area is exposed to glue in a biscuit joint, making the seams stronger.

A variety of spline joints can be made using the biscuit joiner. The number and size biscuits needed for each joint depends on the thickness of the wood and the length of the joint. In general, the small #0 biscuits should be used for miter cuts in 3/4 in. materials. The larger biscuits should be used for edge-to-edge joinery.

When joining 1-1/2 in. thick materials, stack two biscuits, one above the other. For example, use this method when joining 2 in. x 4 in. dressed lumber. When joining even thicker materi- als, use additional biscuits, stacked above each other.

When making edge-to-edge joints for tabletops, work- benches, cutting boards, etc. the more biscuits you use, the stronger the joint will be.

TURNING ON/OFF THE BISCUIT JOINER

See Figure 4.

To turn on the biscuit joiner, depress the switch trigger. Re- lease the switch trigger to turn the biscuit joiner off.

When operating the biscuit joiner, hold the tool with both hands. Keep one hand on the rear handle and place your other hand on the fence to hold the tool steady against the workpiece.

This tool has a dual grip rear handle that allows the operator to choose from two different hand positions and use the one that is more comfortable.

Fig. 4

JM82 specifications

The Ryobi JM82 is a versatile and compact jigsaw, ideal for both DIY enthusiasts and professional woodworkers. Known for its powerful performance, the JM82 combines modern technology with user-friendly features to deliver precision cutting in various materials.

One of the standout characteristics of the JM82 is its 7-amp motor, providing ample power for cutting through wood, plastic, and even metal. The variable speed control allows users to adjust the cutting speed from 0 to 3,000 strokes per minute. This feature is essential for matching the cutting speed to the material being worked on, ensuring smooth and efficient cuts.

The JM82 also boasts a unique orbital action, offering four different setting options. This orbital feature enhances the cutting efficiency by allowing the blade to move in a circular motion as well as up and down, effectively reducing the resistance and enabling faster cuts in thicker materials. This level of customization empowers users to tailor their cutting techniques to specific tasks, ranging from intricate curves to straight cuts.

Another notable feature of the Ryobi JM82 is its tool-free blade change system. This mechanism allows users to quickly and easily swap out blades without needing additional tools. The ability to change blades effortlessly enhances productivity and convenience, especially when working on projects that require different blade types for various applications.

The integrated laser guide is another remarkable technological advancement in the JM82. It projects a clear line on the workpiece, ensuring precise alignment and professional-grade results. This feature is particularly useful for intricate cuts and patterns, maximizing accuracy and reducing the likelihood of mistakes.

Ergonomics is a key focus in the design of the JM82. The handle is designed with a soft grip, providing comfort during extended use and minimizing user fatigue. A built-in dust blower keeps the cutting line clear of debris, improving visibility and ensuring clean cuts.

In terms of build quality, the Ryobi JM82 is constructed with durability in mind. The sturdy design and high-quality materials ensure that the jigsaw can withstand rigorous use while maintaining its performance over time.

In summary, the Ryobi JM82 is a powerful, feature-rich jigsaw that caters to a wide range of cutting needs. With its adjustable speed, orbital action, tool-free blade change, integrated laser guide, and ergonomic design, it stands out as a reliable tool for any woodworking project. Whether you're creating intricate designs or making straight cuts, the JM82 delivers precision and performance, making it an essential addition to any toolbox.